Stock



(No Model.)

w; GOMSTOOK.

STEAM GENERATOR.

Patented June 6, 1882.

N. PETERS. Phowlillwgnphor. Walhington. D, G.

Jll

UNITED STATES PATENT- OFFICE.

' and may be secured to'the base A.

GEORGE w. COMSTOGK, on new YORK, N. Y. I

STEAM-GENERATO R.

SPECIFICATION forming part of Letters Patent No. 258,892, dated June 6, 1882.

Application filed October 12, 1881. (No model.) I

*To all whom it may concern;

York, have invented certain new and useful Improvements in Steam-Generators, which are fully set forth in the following specification and accompanying drawings.

The object of my invention is to overcome various defects in steam-generators, more particularly those of that class employed in steaming and cooking feed. The defects are especially those due to the difficulty of securingperfeet and water-tight jointure between the different sections and walls of the water-cham-. ber, resulting in the leakage and escape of water and steam, and in the corresponding rusting and wearin g away of the various parts.

Hitherto it has been customary to construct the walls of the water-chamber of sheet metal, in two sections, united together by lap-joint and solder. By reason of heat and expansion it has been found practically.impossibleto preserve such union perfect and water-tight.

My invention consists in constructing the lower section of the outer wall of the waterchamber of cast-iron, in certain improvements in the form and manner of joining the various parts, and in certain other details of construction hereinafter fully described.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the accompanying drawings, in which- Figure I represents a plan view, partly in section, and Fig. II a vertical section through the line 2 2.

A represents a suitable base, supported upon legs a a, and having a cylindrical fire-box, 0,.

with a grate, B. Upon the base A is supported the lower section,D, of the outer wall of the water-chamber E. This section is of cast metal, preferably conicalin form, as shown in thedrawings, and provided at its bottom part with a projecting annular flange, d, which rests upon projection fits a faucet, V, for emptying the water-chamber. Upon theupperandinner side of the projectingflange' d is a circular groove, 6, into which fits tightly the inner wall, F, of the water-chamber, being the wall which separates the water from the combustion cham- Into this her. This cast-metal section carries also, at its upper edge, a similar flange, f, and groove g. Into the latter is'fitted the upper section, G, of the outer wall of the water-chamber. This upper section, G, is of sheet metal, cylindrical in form, and carries-two gage-cocks, W and X, for high and low water, respectively. Upon the upper edges of the cylindrical'walls F and G is supported an annular casting, H, having the circular flange h and grooves z'and i, into whichfit the cylinders F and G. Each of the grooves e, g, i, and-t" is first filled with asbestus, which serves as a packing, making the joints perfect and water-tight, and which is preferably prepared by mixing it with red lead and oil. The annular casting His secured and firmly held in position by a double series of bolts, a double series being used for greater security and firmness. One series extendsfrom equidistant points near the outer edge of said casting and screws into cars 70 at the upper edge of the casting D'. The other and inner series, K, extends from points near the groove 1', and is screwed to and bolted through the projecting flange d of the casting D.

Within the cylinder F, and concentric there- .with, is suspended a magazine, L. In some instances it may be desirable to construct this magazine in a more or less conical form. It consists of three parts a casting, M, forming the lower extremity, and being of cast metal in order to better withstand the heat; a sheetmetal cylinder, N, to which the casting M is riveted. To the upper extremity of the cylinder N is riveted the third part, 0. This third part 0 is a cast-metal ring, resting upon the annular casting H, and having a removable cover, P.

It represents the outlet for the combustionchamber.

v S is a-hole in the annular casting H, into which is tightly fitted a safety-valve.

Tis a second hole in said casting H, into which fits an air-valve, which may be removed in order to fill the water-chamber.

U is a third hole in said casting H, for receiving the steam-conductor.

All of the screws and bolts communicating with the water-chamber-such as T, K, W, &c.-are rendered water-tight by means of an asbestos packing, as described with reference By constructing both the lower section, D, of the water-chan1her and the ring H of cast metal and providing them with flanges and grooves, and by the use of bolts and asbestos packing, I am enabled to joint each section of sheet metal into cast metal, to dispense with the use of solder, and at the same timeto secure more perfect and water-tight jointure.

I do not wish to confine myselfto the use of iron in the construction of my invention, as other metals may be found more desirable in some cases.

Having thus fully dcsclibed my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A steam-generator consisting of the combination,substantiallyashereinbeforesetforth, of the cast-metal base, a conical section otcast metal supported thereon, a cast-metal top, united with said section by bolts, two intervening cylinders of sheet metal jointed therewith, and a central magazine supported from said top and provided with alid of cast metal.

2. In a steam-generator, the combination, substantially as hcreinbefore set forth, of a cast-metal base, a cast-metal top, an intervening water-chamber, a combustion-chamber, and a fuel-magazine, said water-chamber being constructed with an inner cylindrical wall and an outer wall, consisting of an upper cylindrical section and a lower section converging toward the bottom of said inner wall and having its sheet-metal sections jointed with castmetal portions of the generator, and said top being constructed with an outer annular casting forming the top of the water-chamber, and. a second annular casting resting upon the inner edge ofthe outer casting.

3. In a steam-generator, the lower section of the outer wall of the water-chamber, constructed of cast metal, and provided. with a flange projecting inwardly from its lower edge, a circular groove around the upper side ofsaid flange, and a similar groove at the upper ex tremity of said section, substantially as shown and described.

GEORGE WELLS GOMSTOCK.

Witnesses:

SAM. J. YATES, A. T. Moonm. 

